If the snake is not pregnant or shedding, and its enclosure is properly equipped, a loss of appetite probably signals a beginning of hibernation.
1	If	if	SCONJ	IN	_	6	mark	6:mark	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	3:det	_
3	snake	snake	NOUN	NN	Number=Sing	6	nsubj	6:nsubj|8:nsubj	_
4	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	6	cop	6:cop	_
5	not	not	PART	RB	_	6	advmod	6:advmod	_
6	pregnant	pregnant	ADJ	JJ	Degree=Pos	22	advcl	22:advcl:if	_
7	or	or	CCONJ	CC	_	8	cc	8:cc	_
8	shedding	shed	VERB	VBG	VerbForm=Ger	6	conj	6:conj:or|22:advcl:if	SpaceAfter=No
9	,	,	PUNCT	,	_	15	punct	15:punct	_
10	and	and	CCONJ	CC	_	15	cc	15:cc	_
11	its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	12	nmod:poss	12:nmod:poss	_
12	enclosure	enclosure	NOUN	NN	Number=Sing	15	nsubj:pass	15:nsubj:pass	_
13	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	15	aux:pass	15:aux:pass	_
14	properly	properly	ADV	RB	_	15	advmod	15:advmod	_
15	equipped	equip	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	6	conj	6:conj:and|22:advcl:if	SpaceAfter=No
16	,	,	PUNCT	,	_	22	punct	22:punct	_
17	a	a	DET	DT	Definite=Ind|PronType=Art	18	det	18:det	_
18	loss	loss	NOUN	NN	Number=Sing	22	nsubj	22:nsubj	_
19	of	of	ADP	IN	_	20	case	20:case	_
20	appetite	appetite	NOUN	NN	Number=Sing	18	nmod	18:nmod:of	_
21	probably	probably	ADV	RB	_	22	advmod	22:advmod	_
22	signals	signal	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	0:root	_
23	a	a	DET	DT	Definite=Ind|PronType=Art	24	det	24:det	_
24	beginning	beginning	NOUN	NN	Number=Sing	22	obj	22:obj	_
25	of	of	ADP	IN	_	26	case	26:case	_
26	hibernation	hibernation	NOUN	NN	Number=Sing	24	nmod	24:nmod:of	SpaceAfter=No
27	.	.	PUNCT	.	_	22	punct	22:punct	_
