Good Morning and welcome. I am Dr. Loretta, a licensed veterinarian and I am happy to answer your question.
I am so sorry that poor Bisquit is suffering this distress...he has been emotionally challenged and this is hard for a cat to get over.
You can try these tips that will help Bisquit past this and decrease his grumpiness....we ma not be abke to stop it altogether but at least this will decrease it so your daughter is not at risk.
1. Purchase Feliway diffuser at the pet store. This is a feline pheromone that acts as a calming agent and decreases anxiety.
2. Purchase Rescue Remedy at the pet store. This also acts as a calming agent.
3. Have your vet examine Bisquit to be sure that this grumpiness is not related to some form of pain thet he has been suffering from. If this is the case, pain relievers will help If this is ruled out, your vet will precribe an anti anxoety medication such as Clomicalm that will reduce anxiety and help Bisquit past this.
Does that make sense to you?
Please let me know if you have ANY other questions. My goal is to give you 100% satisfaction and if you are not yet satisfied, please Reply so I can clarify for you
Sincerely, Dr. Loretta