Table 6. Apparent total tract digestibility of amino acids in the small breed dogs fed dried and wet foods.

Components	Dried – food (%)		Wet – food (%)		SEM	p-value
	Adult	Senior	Adult	Senior		Food type	Age	Interaction
Asparagine	90.8	90.5	90.1	90.9	0.41	0.88	0.82	0.64
Threonine	91.3	91.1	90.4	91.7	0.38	0.86	0.56	0.46
Serine	92.7	92.6	92.3	93.4	0.32	0.82	0.54	0.46
Glutamic acid	93.4	93.4	93.0	93.7	0.27	0.96	0.61	0.62
Proline	94.4	94.5	94.3	94.8	0.21	0.85	0.58	0.73
Glycine	94.2	94.3	94.3	94.5	0.23	0.82	0.74	0.93
Alanine	92.5	92.7	92.0	92.9	0.31	0.82	0.49	0.66
Valine	90.8	91.2	89.3	91.2	0.40	0.48	0.30	0.48
Isoleucine	91.1	91.5	89.3	91.3	0.42	0.35	0.25	0.47
Leucine	92.8	92.9	91.7	93.1	0.34	0.62	0.44	0.45
Tyrosine	92.8	92.1	91.9	93.5	0.37	0.75	0.65	0.23
Phenylalanine	92.5	92.5	91.2	92.7	0.34	0.55	0.41	0.40
Histidine	92.9	92.7	92.2	92.9	0.32	0.80	0.75	0.58
Lysine	91.2	91.3	90.1	91.3	0.37	0.58	0.50	0.55
Arginine	96.1	95.7	95.4	96.0	0.22	0.73	0.89	0.40
Cysteine	86.2	87.4	86.5	88.1	0.47	0.67	0.25	0.85
Methionine	92.6	93.2	91.9	93.8	0.31	0.94	0.12	0.43
Tryptophan	89.3	88.5	89.5	88.8	0.50	0.84	0.55	0.98