Oh dear, I used to lose a lot of sleep over this issue, but more so when I was actually married. My STBX worked away from home and I always used to wonder what would happen if I had a stroke or heart attack or other sudden death while my first was an infant. I'm sorry if this is excessivley morbid, but I used to imagine her crawling over and trying in vain to breatfeed from my dead body......
I saw a newborn foal do this once after its mare pased away on our farm and I think it scarred me.
Anyway, certainly there would have been a problem because nobody would have checked on me for many days in my home. And even worse when I went out to do winter farm chores with DD1.
Now that DD1 is 4 yo, my fears are finally alleviated, because she knows how to get help for herself and her 1 yo baby sister now. I still hate the thought of anyone else raising them, but that doesn't terrify me nearly so much