Cat And Dog Sanity  

Gives you back your sanity when playing with cats and dogs (3 freely combinable packages):

nosickrotations - Pets will not be sick when you visit/rotate to another household. They will only get sick on very rare occasions. Sick pets at the vet are unaffected.nosickfilthystrays - Strays and pets appearing on Community lots will not be sick and filthy.

commodities - Gives more variety as to the motives of your cats and dogs when loading a household.

quirks - Pet fears and obsessions concerning certain objects will no longer be such a nuisance.

pettopet - Pets interact more with each other.

When you install the "pettopet" module the pets in your Sims' household will be more likely to interact with each other.
Replaces the following of my mods that will no longer be updated: lessfilthydogwalkers, lessplayedpetsickness
Important note: The mod will only start working after you once cured those pets that the game already had market as being sick before installing the mod.