Final answer:
Catheterization should be avoided as a urine collection method for an animal with a history of previous cystotomies for bladder stones.
Step-by-step explanation:
In this case, catheterization should be avoided as a urine collection method. Catheterization involves inserting a tube into the bladder to directly collect urine.
Since the animal has had two previous cystotomies for bladder stones, there is a risk of infection and further complications if catheterization is performed.
Instead, other urine collection methods like free catch or bladder expression can be used.