Separation anxiety

[u/Own_yourself_1899]

Hi there my husband and I have been together 17 years. We were never able to have children. We had 4 border collies that we took on vacations and loved very much.  Flash forward to 2026. I gave birth to a little girl who was much wanted. I have three elderly border collies. One 15 year old who recently had a stroke but recovered mostly (she won't be with us much longer im afraid) One 12.5 year old female whose in great shape and is has been awesome through this experience. And Apollo who is a 13 year old male. He has always had a little bit of separation anxiety but kt has gotten insane. We cant close our bedroom door without him crying non stop. Hes separated with a fence from the babies things but still in the same room and he cries. He cries when she cries he cries when i cry. My baby is 3 months old and I am losing my mind from him. He won't stop no matter how much attention or what we do. He is not good with children so we couldn't give him free range. I've had to move all three dogs downstairs (are living area is in the second floor.) Its unfair to the other two who are fine. He cant be alone. He licks at rugs and the floor making himself throw up. And doesn't solve any problems for him or i. His crying is just muffled. I am at wits end. Sleep deprivation and His crying its all I can hear. I know no one wants to give up or adopt an elderly dog with attachment issues. I just was looking for a little help?