llama
chinchilla
capybara
echidna
ameoba
alpaca
zebra
vicuna
boa
panda
impala
tuna
bacteria
snakes
Okapi is one animal that end in i
roundworms
alpaca
owl
Digestion for non-ruminants starts at the mouth and ends at the anus, just like for any animal, including ruminants.
I am not sure there is an animal. but there is a plant named Turnip
baboon
bulldog
The tiger is an animal that starts with t and ends with r. Additional animals include terrier and tapir.
Cnidaria animals have no heads. So, the name Cnidaria indicates that these animals likely have ends referred to as an "oral" end.
Most of the time, these animals are euthanized and the remains are incinerated. Much of the time, unfortunately, the research done is what ends the animal's life. However, occassionally some animal are treated for any minor injuries or discomforts and adopted out.