So, so, many.
Childhood:
Ringo: Boston terrier; distemper PTS
Taffy: Cockapoo Old age
Adult:
Molly: Doberman: cancer
Maverick: My Tennesee Walking horse, the best I ever rode! old age 30 years old.
Harry: Chinese crested; went away to die, never found him
Kitty: Long haired tabby: mauled by neighbor's dog (Miss you still)
Tomas: A Most Excellent Tan and White Cat, Old age, PTS
I still think of, and miss, them all!