Royal Canin Veterinary Care Feline Neutered Young Male is a complete diet for adult male cats from neutering to 7 years old. 

Neutering has a big effect on hormone levels in cats and while these changes have many possible positive outcomes, like more sociable behaviour and longer life expectancy. 
As soon as 48 hours after surgery changing hormones can cause a cat’s energy needs to decrease by 30%^ but also increases their appetite by 20%*. This can lead to significant weight gain. The answer? A diet that’s precisely right for your neutered pet. 
Source: ~Kanchuk, 2003 - ^ Source: Belisto, 2009 - * Source: Fettman, 1997 - 4 Source: Scarlett, 1994

Key Benefits: 
LEAN BODY MASS:
A diet rich in protein to halp maintain ideal weight in neutered male cats.
WEIGHT MANAGEMENT: 
Moderate starch reduces risk of weight gain and helps cats feel fuller for longer.   
S/O INDEX:
Formulated to help prevent particular urinary crystals (struvite & oxalate crystals). 

Presentaton: Dry  food.
Ingredients: 
COMPOSITION: dehydrated poultry protein, maize, wheat gluten*, rice, maize gluten, hydrolysed animal proteins, vegetable fibres, animal fats, minerals, chicory pulp, fish oil, soya oil, fructo-oligo-saccharides, psyllium husks and seeds, marigold extract (source of lutein). ADDITIVES (per kg): Nutritional additives: Vitamin A: 20500 IU, Vitamin D3: 700 IU, E1 (Iron): 42 mg, E2 (Iodine): 3 mg, E4 (Copper): 5 mg, E5 (Manganese): 55 mg, E6 (Zinc): 180 mg - Preservatives - Antioxidants. ANALYTICAL
CONSTITUENTS: Protein: 40% - Fat content: 10% - Crude ash: 8.9% - Crude fibres: 5.1% - Starch: 23.9%. *L.I.P.: protein selected for its very high assimilation.