Re: Vet can’t treat own pet?
@imadmbfan I had a pet that nearly died because I didn't realize this. You should just add an additional vet clinic to your game that your vet does not own and have them take the pet to that clinic for treatment. If you don't have an extra clinic that's not owned, I have one in the gallery under my user name. If you place the vet clinic and don't have your sim buy it the game will spawn vets for it, and you can go there to treat your pets.
Edit: I have not tested this, but if this happens again for you you could try seeing if a sim in the household who is not a vet can take the sick pet to the family's clinic. It's worth a try. It would only work if they were able to check them in like a normal customer, though, I assume. Also, you can try giving them a wellness treat and see if that will work, depending on the sickness.