Jeg fant nettopp følgende på veterinærsiden til Dr. Wendell Belfield i USA (http://www.belfield.com):
L-thyroxine, one of the thyroid hormones, is extremely essential for skin integrity. When this hormone is in short supply, the animal scratches constantly which causes chronic inflammation. This is most often observed in altered animals.
Though I am an advocate of spaying and neutering, the loss of the male/female hormones diminishes the effectiveness of L-thyroxine. The male/female hormones are not in the body for sex and reproduction alone. They have multiple functions.
When an animal is de-sexed, the immune system is compromised, i.e., the animal's resistance is weakened. With this weakened immune system, it is difficult for the animal to resist allergens which can be manifested as skin allergies.
"...fordi vi fortjener det!" - Azaar, Bahij og Djilál