We are getting an 11 year old mastiff x staffie.
He's arriving in half an hour 
I'm looking for a really good bed, maybe a memory foam one because he has had knee trouble (I think he had both his knees replaced).
He doesn't come when he's called (he's from the NY and hasn't often been allowed off the lead) - is 11 too old to be trained to come when he's called? Do I have to train him with treats?
Will his miss his owner very much?
Any advice very welcome 