
Id not do this....Id be worried about the green discharge ...1.this pup could bring in an infection to your own dogs
.2.if you did take on the role of caretaker,pup would bond with you.The situation could become very difficult as you clearly are a caring owner and these people don't seem to have a clue...you will get hurt.Your ideas will clash with their unrealistic expectations of puppy ownership.
3.if you let the dog out ,will you also be responsible for what he gets into in the garden...my new pup has to be watched like a hawk ,he grabs any plant etc and chews it...how much time will your oh have to dedicate to this pup,which will also become a worry for him.You will also be responsible if he eats anything inappropriate.
....it doesn't sound like the ideal situation for this little pup...the couple have been irresponsible in bringing in a pup when neither has the time to properly care for it. Bulldogs are such people dogs too,this pup is the loser here.I can't imagine any responsible breeder selling a pup to a couple when no one is home.
Sorry, but I don't see this working out.