u/Abject-Split2195

hello all! i want some on advice on how to get my 7 month old dobie to stop terrorizing his 7 year old siblings. (is stopping possible) one is a girl and her brother. she will sort of defend herself but would rather hide from him and i don’t want her to feel like that in her own home. (which is why i didn’t want a third dog but he came into the home without my consent :( don’t get me wrong i still care for him) and with her brother, he will instigate and try to nibble him and swat him with his paw. he knows his sister is his weak spot so he’ll bother her to provoke him. i would just really want for them to get along, so if anyone has any advice, i would appreciate it! thank you.