I am viewing yur picture as I type dis. It is easy to see you are da sweet one from da photo. Now, to da questions:
1). Regawding da squirrels. They must be irRATicated. Your hu-mom (You LOVE her) and your hu-dad (him - asi, asi) clearly do not understand the devastation and distruction squirrels and wabits can cause! You can try showing them where da squirrels have entered the house (chew the hole a little bigger first) and how the rabbits have eaten the flowers (if you’re not sure which ones are poisonous, just bite through the stems)This is the time for stealth! When dey sez yu can gettem, you must PRETEND not to be interested in da aminals by playing with a ball or stick. Den, when da hu-mom is not looking, and da squirrel is thinkin you don’t care about him, you makes your move! ZIP go for the tail! If you shorten his tail a bit, he won’t come back! And he’ll tell all his rodent friends to give you a wide berth because you are the Mighty Jack Bobbitt (arfarfarfarfarf). Also, did you know dat if yuz sticks your paw into were da door joins da frame, you can pull or slide da door open? Yup. It’s true.
And 2) How to rid yourself of your embarrassing brother, Maori? Well, dis bez a tuffie. I know, cuz I’ve tried to get rid of my sister Olive who refuses to grow up. Is der anyway you could make your hu-folk tink he’s been messing in da house while ensuring they don’t think its YOU? Da bestest trick for getting Maori outta da bed is to get under da covers when Maori is on TOP of dem, den roll him off. Dis way he will be growling but you will be blameless (how could you know he was there?). You could also try reverse Sikology. Like betting him he’s not fast enough to nip Hammie’s fetlock as Merry goes by. Or by telling him the hay truck’s tire said he was a wuss and challenged him to a duel. But be careful as deez can be ‘permanent vacations’ and I’m thinkin you prolly likes Maori deep (okay, very deep) down.
Hope dis helps. BTW you look like my handsome grandfather, Rusty. He was a sweetie too 
Your terrierific fwend,
Pinchy