A CAL is a companion animal leader, they over see all animal care except for fish. We don't have one at our store, but this one did.
At the store I work at, we are very diligent about animal care. Our snakes had mites once and we didn't lose any of them, we kept them clean and sprayed with Mite-Off. our animals are very carefully separated by age. (We did have a new girl put a hatchling bearded dragon in with some older ones and he died after being brutally beaten).
Even our hamsters and other rodents are carefully monitored. They get what is called wet-tail, which is diarrhea, and we check them every morning and night individually and if there are any signs we pull them off the floor and immediately give them antibiotics.
We do have a gorgeous Jackson Chameolon that is way too big for his enclosure. When he came to the store he fit, but he just hasn't sold and is no way too large. I wish we had somewhere to put him and have urged my managers to get him a new set up but it isn't "policy".