Pet Diseases
Screen Shot 2023-05-24 at 11.03.36 AM.png - width=2776 height=2034
Screen Shot 2023-05-27 at 10.33.38 PM.png - width=1674 height=1120
Screen Shot 2023-05-27 at 10.55.03 PM.png - width=1802 height=1200
Screen Shot 2023-05-25 at 9.49.33 PM.png - width=2040 height=1518
Screen Shot 2023-05-27 at 10.57.18 PM.png - width=1636 height=942
Screenshot-5444.jpg - width=1400 height=1048
Screen Shot 2023-05-27 at 11.31.44 PM.png - width=412 height=390
- Fixed vaccinate bug where interaction would fail if a sim attempted to take only one pet to the vet
- Added Brazilian Portuguese and German translations!
Here's Echoweaver, back for another installment of the Pets Expansion Expansion.
This mod introduces four diseases (or five, depending on how you count). All can be caught by cats or dogs and are contagious between the two species.
As with Pet Fighting, This mod can be tuned to either allow pets to die of lethal diseases or, for those who don't want that kind of realism with their furbabies, force a pet into a long sleep to recuperate instead of dying. This is just a tuning value, but I've uploaded two flavors for download with death turned on and off so that folks can have the one they prefer without opening a package editor.
This has been a bear to test because all the contagion is based on probabilities. It's hard to be sure what odds are really going to be too little or too much in a real game. Because of that, I've included an extensive tuning resource Echoweaver.Sims3Game.PetDisease.PetDiseaseManager. If the diseases feel like too much or two little, you can change them.
Details of the diseases:
1. Germy: This is essentially a cold.
- Symptoms: Coughing with corresponding drop in energy
- Caught by: Being outside in rain or snow, with a small chance of catching from non-resident sims the pet just met. Cats have a small chance of catching it from fishing when the temperature is at or below 40 degress F.
- Contagion: It can be passed from sim to sim via proximity.
- In most cases, Germy expires, and the sim becomes healthy again. There is a 25% chance it will develop into Pneumonia.
- No cure and no vaccine.
This replaces the Germy moodlet that dogs can get. (At least, the wiki says dogs can get a Germy moodlet, and I've seen threads on it on several forums. I haven't seen it myself, but I usually play with cats.)
2. TummyTrouble: This is EITHER a virus or food poisoning.
- Symptoms: Periodic nauseous moodlets
- Caught by: The virus can be caught from meeting strangers, fishing, playing in the toilet, and eating trash. Food poisoning can be caught from eating human food (higher chance if it is spoiled) and eating prey.
- Contagion: Food poisoning is not contagious. Stomach flu virus is proximity contagious. There's no way to know which one your pet has except by observing.
- Can be cured at the vet. Cannot be vaccinated against.
3. Pneumonia
- Symptoms: Coughing, Wheezing (from dog panting), and passing out.
- Caught by: Having a Germy moodlet and being unlucky. Pneumonia always develops from Germy. It can't be caught on its own.
- Contagion: Currently not contagious.
- Has a 25% chance of being deadly if not cured at the vet.
- Can be cured at the vet. Can be vaccinated against.
4. Petstilence: This is inspired by rabies, but is almost entirely unlike it.
Actual rabies is just too awful to put in the Sims.
- Symptoms: Three stages of increasing behavioral symptoms -- excited, scared, and angry. At the second stage, pet starts drooling. At third stage, flies start swarming around the pet, and the pet may randomly attack other sims.
- Caught by: Low chance of catching from fleas or catching prey.
- Contagion: Fluid-borne. Can be caught from woohoo or fighting with an infected pet. The raccoon is considered always infected for this purpose.
- 100% lethal if not cured.
- Can be cured and vaccinated.
It also adds two human interactions:
- Take to Vet: On a sick pet that can be cured.
- Vaccinate Pets: On Hospital rabbitholes. This action can be performed on multiple pets from your household at the same time. You can't vaccinate pets that are A) currently vaccinated or B) currently sick. Vaccination lasts for one year.
| Filename | Type | Size |
|---|---|---|
| PetDisease1.1_AllowPetDeath.package.zip | zip | |
| PetDisease.package | package | 1712557 |
| Filename | Type | Size |
|---|---|---|
| PetDisease1.1_NoPetDeath.package.zip | zip | |
| PetDisease.package | package | 1712557 |
| Filename | Type | Size |
|---|---|---|
| PetDisease1.0_translation_strings.xml.zip | zip | |
| EWPetDisease_translation_strings.xml | xml | 3067 |
|
PetDisease1.1_AllowPetDeath.package.zip
Download
Uploaded: 12th Jun 2023, 1,001.0 KB.
4,810 downloads.
|
||||||||
|
PetDisease1.1_NoPetDeath.package.zip
Download
Uploaded: 12th Jun 2023, 1,001.2 KB.
1,174 downloads.
|
||||||||
|
PetDisease1.0_translation_strings.xml.zip
Download
Uploaded: 28th May 2023, 1.6 KB.
456 downloads.
|
||||||||
| For a detailed look at individual files, see the Information tab. | ||||||||
Install Instructions
Loading comments, please wait...
Uploaded: 28th May 2023 at 5:30 AM
Updated: 12th Jun 2023 at 3:59 AM
-
by Consort updated 17th Sep 2013 at 3:05am
363
473.1k
959
-
by PJSims 14th Feb 2022 at 12:08pm
11
18.1k
68
-
by echoweaver updated 2nd Aug 2022 at 10:30pm
+2 packs
55 37.1k 109
Seasons
University Life
-
by darren111 updated 5th Jul 2022 at 10:50am
32
18.8k
66
-
by YolkSims updated 8th Jul 2022 at 7:28am
29
59.4k
111
-
by echoweaver updated 27th Aug 2023 at 3:36pm
17
18.2k
69
-
by fantuanss12 updated 6th Feb 2025 at 8:41am
35
26.6k
107
-
by Arro 28th Jan 2025 at 12:48pm
3
8.6k
31
-
by Arro updated 19th Jul 2025 at 9:33am
13
14.2k
42
-
Big Kid Style: EA Child Hairs for Toddler
by echoweaver 28th Oct 2015 at 10:30pm
5 EA child hairs converted for toddlers more...
28
34.5k
134
-
Kelp Recipes for Mermaids and those who love them (Updated Jun-3-2021)
by echoweaver updated 4th Jun 2021 at 5:15am
Now when you "Discuss Kelp Recipes," you can actually talk about something! more...
+1 packs
21 15.9k 80
Island Paradise
-
Logical Bed and Appliance Stats
by echoweaver 21st Apr 2025 at 8:37pm
I've been running with Same Energy Gain for Every Bed for a long time because after the base game, almost more...
12
7.1k
18
-
by echoweaver updated 27th Aug 2023 at 3:36pm
17
18.2k
69
-
by echoweaver updated 15th Sep 2021 at 11:20pm
Even though Sims 3 cats and dogs can be player-controlled active sims, I've never thought they had much depth of more...
+1 packs
37 22.1k 135
Pets
-
by echoweaver updated 5th Jun 2023 at 4:07am
I've been playing a challenge that revolves around being a medieval English peasant, and as my sims tried to eek more...
65
16.6k
74
-
by echoweaver updated 14th Feb 2024 at 4:19am
Hello pet enthusiasts! After my Cat Fishing Skill release, my next installment in my Pets Expansion Expansion is a Fighting skill. more...
+1 packs
68 15.7k 67
Pets
-
Children Can Repair Base Game Objects (No Stretch)
by echoweaver updated 13th Jul 2024 at 7:38pm
-
by echoweaver updated 20th Aug 2023 at 5:03pm
I played an active household that used a laundromat for the first time here in 2023, and I had a more...
+1 packs
23 25.4k 116
Ambitions
-
by echoweaver updated 2nd Aug 2022 at 10:30pm
Here's something different from my recent mods -- a mod for humans. more...
+2 packs
55 37.1k 109
Seasons
University Life
Packs Needed
| Base Game | |
|---|---|
![]() | Sims 3 |
| Expansion Pack | |
|---|---|
![]() | Pets |
Sign in to Mod The Sims
Pet Diseases

