11 month old yorkshire terrier x cocker spaniel

We've had 'Peppa' since she was 10 weeks old. Things were really good with her, shes house trained etc but these last few months shes showing alot of jealousy around our other dog and really fighting each other! Its awful to watch and we have 3 young children. It can be treats, toys, food or simply stroking our other one. Its got to the point now where my little one cries and its very difficult to safely break them up. So im rehoming peppa and advising she goes to a home where shes the only dog. She's been around a cat and they are fine, she will chase her but the cat says when shes had enough. Peppa is absolutely fine with people and used to children. Fine on walks and enjoys greeting other dogs . Please no timewasters as this is hard as it is. Priced fairly for a good home.