We had to take Frenna back today. Poor puppy we could not get her to stop tackling Lexi. Toward the end both Nate and Lexi was scared of the puppy because she wanted to bite their shoes or nip at their legs.
If we do try and get another dog it will be after the kids are older. The worker at the shelter said she usually recommends waiting until the kids are 5-8 for larger dogs (why she did not tell us this when we were adopting Frenna I have no idea).