Pets wandering around ill, dirty and miserable

I don't play rotationally, so I haven't thought about it like that, but yeah. whenever a pet get sick, all the premades shows up with their pets too.
It's most likely a "We must generate 40 sick pets per Sim day to be sure Vet Clinic makes profit.

Another thing is strays as such, of course. It always shocks me, because where I am from strays are non existent for dogs, and not that common for cats.