Everything has advantages and disadvantages. In the exclusive zoophile life, this is basically determined by why you became exclusive. Those who are asocial, avoid society and find it difficult to make friends have their disadvantages more prominent. People who are more social, people-oriented, and easy to make friends, just they simply find their sexual lifestyle best in exclusivity, they are less aware of its drawbacks.
I'm somewhere in between, I tend to be more asocial.
The upside is that I don't have to put up with another person in my life. Everything happens the way I want, I don't have to adapt to anyone. Except for my dogs, but I love my dogs, I gladly adapt to them.
The sexual advantage is that you don't need a condom, you don't have to worry about pregnancy, cheating on your girlfriend (she doesn't take the pill, for example), cheating other people and all the negative human qualities.
Dogs also have negative qualities, but they are still kind.
The downside is that the dog lives for a shorter time. You keep more of the dog, you have to bury even more during your life, and this is hellishly painful and every time it wounds your soul and changes you a little.
You can't talk to them, they can't help you, you have to do all the work by yourself. And you have to do the dogs' work too. Obviously, those who love their dogs are not bothered by this.
If you are sick or it is difficult to find a suitable person to take care of the dogs, it makes job opportunities difficult, there are additional laws for dogs, and zoophilia is also punished etc.
The dog can replace one half of social life, but not the other half.
Most of these disadvantages are helped by having friends. If they are not, there will be mildly or moderately unpleasant periods in the exclusive life. Some can handle well, some more difficult. Maybe if you don't need human conversation for some psychological reason, you're "lucky". XD
There is no sexual disadvantage to exclusive zoo life. At most, you can't have children, but I think 99% of excluzoo don't want children.
Taken together, zoo exclusive life is beautiful, wonderful and special. You show respect to animals by only living in a relationship with them, not with humans. You dedicate your whole life to them. This is such a great and deep respect that it is impossible to imagine.