One of our dogs is currently under very heavy medication (something similar to cortisone). Our vet who took this stuff herself during an illness described the side effects to be so exhausting it makes death seem the better option sometimes. A person however is capable of understanding the need of the treatment, what causes the side effects and that they will end after treatment. It is impossible to explain this to a dog.
In the last few days our dog fell into the pond several times while he tried to drink. He always drank from the pond before and normally isn't as clumsy, sometimes he really seemed to slip into the pond on purpose. This only happened after the dosage was reduced, before he was too exhausted to go outside most of the time. I am not interested in the cause of this behavior, as I am currently not near the dog and can't really judge the effect of the drugs on him.
Are dogs capable of committing suicide?
Are they aware of the consequences their actions have and can chose to die intentionally?
Note: I am interested in research on this subject, opinions or anecdotal evidence can't really answer my question. An answer does not have to be specifically about dogs, but it should show that assumptions made on other animals apply to dogs, too.