Have a solid contract that will detail EVERYTHING:
How the animals are divided the type of split whether it is 50/50, 70/30 etc (split depends on the value of the animals if one is more valuable than the other obviously the person with the most valuable animal will get a bigger split.
Who gets the first pick
What happen if one animal becomes sick, requires a vet and who will pay for it.
What happens if the animal die how will it be replaced.
Etc
Keep in mind that a loan with a pet store can be VERY risky because there is so much turnover animals coming and going and with VERY little quarantine.
Thanks, I'll keep that in mind.
ALL the animals breeding will be mine. So payment would mostly be food/boarding/breeding costs.