There are a lot of genetics at play between a Sussex and Silkie, so the offspring would vary in appearance.
1	There	there	PRON	EX	_	2	expl	2:expl	_
2	are	be	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	0:root	_
3	a	a	DET	DT	Definite=Ind|PronType=Art	4	det	4:det	_
4	lot	lot	NOUN	NN	Number=Sing	2	nsubj	2:nsubj	_
5	of	of	ADP	IN	_	6	case	6:case	_
6	genetics	genetics	NOUN	NNS	Number=Plur	4	nmod	4:nmod:of	_
7	at	at	ADP	IN	_	8	case	8:case	_
8	play	play	NOUN	NN	Number=Sing	4	nmod	4:nmod:at	_
9	between	between	ADP	IN	_	11	case	11:case	_
10	a	a	DET	DT	Definite=Ind|PronType=Art	11	det	11:det	_
11	Sussex	sussex	NOUN	NN	Number=Sing	2	obl	2:obl:between	_
12	and	and	CCONJ	CC	_	13	cc	13:cc	_
13	Silkie	silkie	NOUN	NN	Number=Sing	11	conj	2:obl:between|11:conj:and	SpaceAfter=No
14	,	,	PUNCT	,	_	2	punct	2:punct	_
15	so	so	ADV	RB	_	19	advmod	19:advmod	_
16	the	the	DET	DT	Definite=Def|PronType=Art	17	det	17:det	_
17	offspring	offspring	NOUN	NN	Number=Sing	19	nsubj	19:nsubj	_
18	would	would	AUX	MD	VerbForm=Fin	19	aux	19:aux	_
19	vary	vary	VERB	VB	VerbForm=Inf	2	parataxis	2:parataxis	_
20	in	in	ADP	IN	_	21	case	21:case	_
21	appearance	appearance	NOUN	NN	Number=Sing	19	obl	19:obl:in	SpaceAfter=No
22	.	.	PUNCT	.	_	2	punct	2:punct	_
