Belgian Shepherds come in four varieties: 1  the Belgian Groenendael (longhaired black) 2  the Belgian Tervuren (longhaired fawn/mahogany) 3  the Belgian Malinois (shorthaired fawn/mahogany)  the Belgian Laekenois (roughhaired fawn)
Depression causes lack of appetite. The cat will be less active, sleep more, will be aggressive, easily irritable and sometimes extremely vocal. Depression may be caused by loss, lack of attention from the owner, hormonal imbalance or a disease. Depression can be treated with mild antidepressants.
So long as the gecko has a fat healthy tail this should be nothing to worry about. Should the gecko lose significant weight, particularly in a short period of time, a vet should be consulted. A number of leopard gecko ailments could cause such a lack of appetite, however likely causes could include parasites.