In order to maintain your companion's health, it is important to understand where he or she is in the "life stage" cycle. Both age and weight are necessary information to classify your pet as young, adult, senior or geriatric. Depending on your pet's life stage classification, he or she may have different health and diet needs.

Following the table below, you can locate your pet's age in years. Now, match the age in years with your pet's weight and the corresponding color code will identify your pet's life stage. For example, a 9-year old dog weighing 70 pounds is 61 in "human years" and is classified as a senior pet.

Life Stage Chart



Relative age of your pet in "human years"
Years 1-20 lbs 21-50 lbs 51-90 lbs 90 lbs
5 36 38 40 42
6 40 42 45 49
7 44 47 50 56
8 48 51 55 64
9 52 56 61 71
10 56 60 66 78
11 60 65 72 86
12 64 69 77 93
13 68 74 82 101
14 72 78 88 108
15 76 83 93 115
16 80 87 99 123
17 84 92 104
18 88 96 109 Adult
19 92 101 Senior
20 96 105 Geriatric

2335 S. Shields — Fort Collins, CO

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(970) 482-1987

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Monday-Friday

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