Being cranky, sore teeth whatever, is not a reason to growl at or bite your owner. There is a serious lack of respect.
Without more info its impossible to say too much. And with lots of work both the behavioral side and the medical side (if anything is wrong) can likely be resolved.
But lets be realistic. They have an 11 yr old dog with bad hips who has repeatedly seriously bit his owners at least twice. The future: lots of rehabilitation type training, probably a lot of vet bills, likely never complete trust, and a very limited life span.
If it was a friend of mine, I'd recommend he spend his money and energy on buying and training a new pup.
Without more info its impossible to say too much. And with lots of work both the behavioral side and the medical side (if anything is wrong) can likely be resolved.
But lets be realistic. They have an 11 yr old dog with bad hips who has repeatedly seriously bit his owners at least twice. The future: lots of rehabilitation type training, probably a lot of vet bills, likely never complete trust, and a very limited life span.
If it was a friend of mine, I'd recommend he spend his money and energy on buying and training a new pup.