I wouldn't worry, Bailey sleeps alot also, especially when its real hot, or cold, it is what he does. I worried about it before also.
Bailey comes to work with me also, I am so thankful. It is great, NO GUILT, about leaving him ever. He has his bed, food, toys,and greets everyone that comes in the door, of the office.
If only they could get a paycheck..

He's promt and reliable m-f (8-5) Never misses a day!
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Rhonda, Bailey, Josie and my angel Bella Rue'
"Until one has loved an animal, a part of one's soul remains unawakened."
~Anatole France~