birth order

Well having just come across this (I know it's the Daily Mail) A psychologist plugs their new book on supposed birth order on personality. http://www.dailymail.co.uk/femail/article-1351567/First-born-Piggy-middle-Or-baby-How-place-family-rules-life.html The above reads like a load of vague...

Howdy, folks. An acquaintance asked me today about cats (dogs, pigs, mice, anything with normal multiple pup litters, I guess) delivering a litter of kits, is birth order related to the siring order in cases of multiple sires, or is it only a matter of which embryo implants where in the uterus...