A STOAT is a species of mustelid, a small but powerful predator hunting mostly rabbits (lagomorphs) and rodents. Adult male stoats「beast with prick head for all stages of life, at birth」will copulate with completely juvenile female stoats which are so newly birthed that the females do not yet possess the ability to see or hear, typically still blind, deaf, and nearly hairless: an animal without the morality of (most, but not all) modern human cultures. Many carnivores [and pedophiles] hunt the young of their prey as the meat easiest to capture and possessing the most tender and tastiest meat. Because the female is an unweaned infant when fertilized, the embryos do not immediately implant in the uterus. Instead, they undergo a prolonged period of ARRESTED DEVELOPMENT (diapause) lasting roughly 9 to 10 months.
One point worth noting is that human beings are the only animal known to not eat only raw meat; that is to say, humans routinely cook meat prior to ingestion (but, not always). Therefore, reading these elements as "beast with raw" or as "beast with life" does not narrow the field of possibilities at all, leaving「beast with prick head for all stages of life, at birth」likely as the only viable reading. Other animals may prefer meat cooked by humans over raw meat though, and who can argue with barbeque in that regard? Other animals, such as damselflies and dragonflies, fig wasps, pyemotid mites, nematodes and parasitic worms also copulate with newly hatched females of their species, but are not normally considered to be "hairy beasts" as are the STOATS, being a famous mammalian outlier.
Perhaps ARRESTED DEVELOPMENT applies mentally and morally as well as anatomically when COPULATING WITH NEWBORNS.

External source definitions
none located, and you ought to ask yourself, why not?
definition speculated from combining the elements, or, from usage in other glyphs