Retics are very active snakes and move around a lot. That pushing in the corner is normal along with lots of urination. Whistling while breathing is also common with retics. Be aware of wheezing with bubling mucas from the nostrils as that would be a RI. Though retics seem to seek cooler temperatures at times they seek out heat. I use under tank heating for mine and provide a hot spot of 90 degrees with the rest of the cage in the 70s. Bill
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...three years ago it was just another snake cult...
The Retic is King.
Anacondas-the other Dark Side.
Afrocks-the dark side of the Dark Side.