Table 2 Food items' loadings to PCA components showing puppyhood (PU) and adolescent (YO) diet style.

From: The effect of puppyhood and adolescent diet on the incidence of chronic enteropathy in dogs later in life

Puppyhood	RC1 NPMD + UPCD- 17%	RC2 Cooked 12%	RC3 Leftovers 12%	RC4 Outside 11%	Adolescence	RC1 NPMD + UPCD- 17%	RC2 Cooked 13%	RC3 Leftovers 12%	RC4 Outside 10%
Raw berries	0.54	0.11	0.22	0.26	Raw berries	0.58	0.08	0.2	0.23
Raw vegetables	0.64	0.09	0.2	0.18	Raw vegetables	0.68	0.07	0.15	0.15
Cooked vegetables	0.27	0.63	0.39	0.04	Cooked vegetables	0.25	0.67	0.36	0.04
Cooked potato	0.14	0.22	0.68	0.11	Cooked potato	0.07	0.18	0.71	0.13
Fruits	0.48	0.18	0.26	0.16	Fruits	0.5	0.18	0.25	0.15
Cooked tripe	0.1	0.78	− 0.01	0.08	Cooked tripe	0.05	0.82	− 0.03	0.07
Raw tripe	0.78	0.08	− 0.01	0.05	Raw tripe	0.77	0.07	− 0.06	0.05
Cooked organ meats	0.25	0.83	0.07	0.07	Cooked organ meats	0.23	0.84	0.06	0.08
Raw organ meats	0.88	− 0.05	− 0.03	0.06	Raw organ meats	0.87	− 0.05	− 0.1	0.07
Cooked bone and cartilage	0.06	0.78	0.06	0.12	Cooked bone and cartilage	0.02	0.78	0.06	0.14
Raw bone and cartilage	0.80	0.05	0.04	0.13	Raw bone and cartilage	0.81	0.01	− 0.01	0.13
Non-sour milk products	0.09	0.1	0.65	0.15	Non-sour milk products	0.05	0.1	0.64	0.15
Vegetable oils	0.48	0.2	0.32	0.1	Vegetable oils	0.53	0.19	0.25	0.06
Fish oils	0.56	0.2	− 0.02	0.02	Fish oils	0.54	0.16	− 0.01	0.01
Animal fats	0.46	0.14	0.35	0.04	Animal fats	0.46	0.14	0.31	0.03
Cooked egg	0.21	0.62	0.34	0.08	Cooked egg	0.19	0.65	0.32	0.08
Raw egg	0.7	0.03	0.14	0.1	Raw egg	0.72	0.02	0.1	0.09
Dry dog food	− 0.72	− 0.01	− 0.02	0.12	Dry dog food	− 0.73	− 0.01	0.12	0.11
Blood pancakes	0.22	0.16	0.56	0.08	Blood pancakes	0.19	0.15	0.57	0.09
Liver casserole	− 0.02	0.16	0.64	0.01	Liver casserole	− 0.04	0.15	0.64	0.04
Human meal leftovers	0.05	0.02	0.73	0.18	Human meal leftovers	0	0.02	0.72	0.19
Grain products	0.23	0.4	0.57	0.14	Grain products	0.17	0.44	0.53	0.09
Cooked rice	0.14	0.51	0.49	0.1	Cooked rice	0.17	0.5	0.41	0.1
Raw red meat	0.57	0.1	0.03	0.11	Raw red meat	0.6	0.1	0.03	0.07
Cooked red meat	− 0.09	0.71	0.32	0	Cooked red meat	− 0.1	0.7	0.34	0
Cooked poultry	− 0.13	0.58	0.46	0	Cooked poultry	− 0.13	0.52	0.46	0.02
Processed meat	− 0.05	0.06	0.52	0.21	Processed meat	− 0.07	0.11	0.52	0.18
Cooked fish	0.11	0.45	0.47	0.05	Cooked fish	0.08	0.42	0.47	0.05
Raw fish	0.84	− 0.05	− 0.06	0.07	Raw fish	0.79	− 0.11	− 0.1	0.09
Sticks outside	− 0.01	0.06	0.12	0.74	Sticks outside	0.01	0.06	0.1	0.71
Grass outside	0.09	0.07	0.16	0.76	Grass outside	0.09	0.08	0.14	0.73
Clay and stones outside	0.03	0.06	0.02	0.77	Clay and stones outside	0.02	0.06	0.03	0.77
Dirt outside	0.06	0.08	0.04	0.79	Dirt outside	0.05	0.11	0.05	0.78
Puddles outside	0.16	0.01	0.18	0.68	Puddles outside	0.15	0.03	0.19	0.67
Feces outside	0.16	0.07	0.09	0.58	Feces outside	0.14	0.07	0.11	0.59
Carcasses outside	0.25	0.01	0.23	0.53	Carcasses outside	0.2	0.01	0.23	0.58

Variables that were significantly different (Mann Whitney U-test p < 0.05) between controls and CE cases in the preliminary screening are in bold. Loadings ≥ |0.4| are in bold. NPMD = non-processed meat-based diet, UPCD = ultra-processed carbohydrate-based diet, Cooked = home-cooked diet, Leftovers = human meal leftovers and table scraps, Outside = items eaten outside. Percent of variation explained is shown for each component.

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Table 2 Food items' loadings to PCA components showing puppyhood (PU) and adolescent (YO) diet style.

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