Late/Non Responders to CIDRs

Here is my scenario.  We used the 5-day protocol for CIDRs with two 5 ml. injections of Lute when we pulled the CIDR, one chute trip, on 6 cows.  Pulled CIDRs and Luted on May 6.  Within 84 hours 4 of the six had cycled and bred.  The two remaining, one a first calf heifer, one a 4 year old, did not cycle, until today.  The 4-year old is riding a cow in her natural heat.  The 4-year old seems OK if the other cow would mount but we haven't seen it happen yet.  Here are my options:
1.  Let her go until the next cycle (18 - 21 days from now).
2.  Breed her tonight and maybe in the morning in case she is in.  Could she even be in 5 and a half days after pulling CIDR, or 132 hours.  Semen cost is not a concern.
3.  Come back with a Lute shot on May 17 (11 days after last one May 6).
Trying to get this first round of AI behind us and keep the calving season compact.  Dr. Coover told me when CIDRs first came on he scene that it always brings them into heat.  If you didn't detect heat, you missed it.  Maybe over night.  I beg to differ because we always use a heat patch.  This year we're trying StandingHeat patches and so far really like them.  A little harder to get to stck, but tail adhesive helps a lot.  So we're not missing them.  They just don't come in like advertised.

We use the 7 day timed cidr protocol and was told that it if they don't show a heat to go ahead and breed with the rest and then again twelve hours later first time we did this was last year had three we bred twice and all three stuck but never showed a heat.  We use the estrotect heat patches.

I would breed them tonight and in the AM.

How confident are you in palpating ovaries? 

We aren't using CIDRS at all this year and I know quite a few guys that aren't either.  If they don't stick off the CIDR it's too big of a gap. 

We're setting up 45-50 and they will get one shot and breed off that heat.  Lots less chute time but more heat detecting time.  Thankfully my camera set up records motion so hopefully it will help with overnight heats.

I used the 5 day protocal last year and had 25% of the cows show heat. None caught on time breeding. I switched back to the seven day on the 2nd group and my first group this year and have 100% on seeing all them stand with the 7 day. Just what I experienced. But I will never use the 5-day again

A lot of years ago when lutalayse first appeared, we used it by the gallon seemed like. Being new and with customers wanting cow bred, we exposed everything whether heat was observed or not.  About 1/2 the cows that didn't show heats turned up bred. Luck, good technique, or my smiling face, I dont know, but ever since, we exposed the cows unless semen cost or availability was an issue.