Any dog in heat can display multiple symptoms. Any change in behavior could very reasonably be related.
No, every dogs shed... but not when they're in heat ,because there are different reasons for that...
Because the heat makes your muscles relax and therefore makes you tired.
same as you. they are tired of standing.
because they get tired.
Horses do because dogs get tired faster.
The sun makes you tired with the heat
Any change in a recovering dog's progress (or lack of progress) needs to be reported to the vet.
Heat for tired cold for swollen heat or cold for sore, let your gut tell you on that one.
They were tired of feeding them.
They are tired
Female dogs typically go into heat, also known as estrus, twice a year. During this time, they are receptive to mating and can become pregnant. If a female dog has been spayed, she will no longer go into heat.
Very often dogs just flop down when they are tired and do not want to continue.