mls, I have no problem with your advice to call the vet. I suppose you are right in that both the hoof heat and the digital pulse are not markers whereby to call the vet or not unless you are completely familiar with what is normal for your horse or know exactly what you are looking for.
In my case, because I have two really fat horses, I am very familiar with both normal hoof heat and where to take the digital pulse cause I do it quite often now that they are out on grass for 6 to 7 hours a day(the rest on dry lot) and both have weight issues, especially the draft.
That being said, while it is a good idea for this poster in particular NOT to base her decision to call a vet or not on heat/pulse..... it's always a good thing to learn. I encourage everyone to know what is normal for your horse as warm hooves can be normal....i..e. our gray has coal black hooves, and they are usually warm on sunny days, sometimes very warm....while our draft has light tan hooves, and they are usually cool, even when it is sunny..... back to the point: all horse owners should know where and how to feel the digital pulse and know the normal feel of your horse's hooves....that way, if a problem comes up, you will know it is out of the norm. And take quick action by calling your vet.
But considering the circumstances of THIS case in particular....and the owner's age/experience/familiarity with normal for her horse...... i think having a vet do an exam would be a good idea. I don't disagree with mls on that