Almost 4 months
Hi, our puppy is almost 4 months now. He is quiet sweet. He loves car rides and meeting people. But he keeps biting my 9 year old sister.... just like playing, because they do play a lot. He is potty trained already, sleeps at night and takes naps during the afternoon, he sits on command and gives the paw. He adores his bed but he recently took its filling out of it, he likes being outside when the weather feels nice (it is a really hot city), he loves blueberries and dog biscuits. But he just discovered he can jump on people and chairs (somehow he never tries to sits on beds or couches), he also likes to bite chairs when we are not looking haha (But he has toys, some stronger than others).
Is there a way to handle how he bites my little sister?
Also, is there anything we can do with the jumping?
Would you encourage more socialization with other dogs? (He does not know many)