Oh yes, quite normal (in my little world anyway!!)
I still check for breathing when my (9 month old) pup is having a doze on the sofa. I was quite paranoid for his first few weeks and was convinced that any little upset tum would result in him going to sleep and never waking up.
I was a million times worse with the pup than I was with my DD
Heaven knows how I will be on the 8th July when he is going in for his neutering op ………...
I distinctly remember a horrible moment when me and dh both thought the worst...she was just in a deep sleep! That was a decade ago and tbh I've started doing the regular breathing checks again, but it's not as scary, more accepting and a bit sad (aging ddog now) (she will hopefully be with us a few more years)