is there even anesthetic in DF at all? I've watched videos of this being done on animals and it certainly doesn't look painless. But I can't really confirm that dwarves have the equipment that real life males and females generally have.
In middle ages, in some vilages and stuff we are still using bozee (like vodka, spiritus (clean alcohol) as anesthetic and wound deinfection method. As anesthetic you can overdose it, so you will pain less, as desinfection tool you are using it directly on wound. It feel painly only for short period, later you doesnt feel that. Sadly, when you using alcohol on flesh there will be always bad looking scar and you will lose feel in scar area because you burned out nerves. We are not using alcohol as anesthetic, mostly because your veins and alteries are expanded because of it (this is why most drunk people are freezing during winter, They feel warm because there is fight inside your body, but your veins are expanded, so you are losing heat faster... and when you are cold enough (or drunk) your heart beating is slower and slower... so you are more sleepy and more sleppy... and you are losing consciousness/senses.
Being on topic, Why you want make your dwarves lazy and fat? Look at male cats after castration, they are only sleeping, just because They are not motivated by sex and strugling for sex. This is why coruples are more productive, even when They are "wasting" more time together.
And children… can dissapear in worse scenario, just olck them down in small rooms with booze and food... or without... Later just prepare slab for him in some small tomb and coffin... This is sad when i am thinking about it...
Mothers in my militaria are just trainers, every two/three momies are training with green dwarfs, just because They are training my recruits faster. Four recruits squads are usualy doing worse work in military then two average, just because, recruits are faster to panic when They see death. Panic is spoiling hearts even most brave warriors, even in game. And more lost units causing more trauma over your ranks or whole frotress, so danger of spiral tantrum will be greater.
In my fortress some dwarves are dying from old age.