so i have 2 guinea pigs, both female named pip and rio and i've had them since the beginning of june, they were from the same litter and have never been apart, alway have gotten along but pip had always been the more dominate one of the two . about 3 days ago the one, rio, started chasing pip around and does not leave her alone, pip is very scared of her and whenever rio comes near she starts to squeak, rio also nips at her. i have a hut that they use to always sit in together and now pip sits inside scared while rio sits outside the opening not letting her out. does anyone know what i should do? i try and separate them for a bit and at night so pip can get some rest and i try my best to keep them together to work it out but pip gets so terrified, HELLLP