Seems to me the alpha/lead cow does most the "heat detecting" for us, all others seem uninterested. If she's by another cow/heifer that I'm marking (especially 21 days post AI), I watch and wait and she's been pretty good at letting me know. 2 that missed round 1 sync this spring we got on non-sync'd standing heat and they took, thanks to the same lead cow, and she's a fall calver (just calved last month) so she was riding due to her own cycle, agenda, etc. Bred one 3 weeks ago and was checking her this afternoon, no one anywhere near her or interested, but i'll be watching her prob. till sat. AM to see if she draws any interest. I've learned too, if I'm second guessing if someones' riding/getting attention, i''ll come back 3 hours later or so, and if it seems to be the same line-up, well then, I'm starting to believe I'm not just imagining things ....