There is '''no international standard defining how feeding guides are calculated''', and manufacturers may take different approaches, using different assumptions on how they do this. Different products may recommend feeding different amounts of energy for the same animal, and can result in either an over- or under-estimate of their ‘actual’ energy needs. | There is '''no international standard defining how feeding guides are calculated''', and manufacturers may take different approaches, using different assumptions on how they do this. Different products may recommend feeding different amounts of energy for the same animal, and can result in either an over- or under-estimate of their ‘actual’ energy needs. |